> open list exists which a large fraction of the closed list people read.> I'm open to suggestions though.

a conscious being, Robin Hanson wrote:
This is a hard question. One that has taken up hugh amounts of list
traffic and ignited many flame wars.

Simply put this is will always have some "intellectual insularity" and
the reason for that to we trade off that for being able to have depth
discussion and debate on Extropian topics. As Robin pointed out there
are lists that are completely open. We risk "intellectual insularity"
to avoid having to to risk not being able to really fine hone our
intellect. We need some forum dedicated to advancing Extropian thought
- this list is it.